The application of viscoelastic damping materials to control the vibration of magnets in a synchrotron radiation facility

Conference · Sat Jul 01 04:00:00 EDT 1995

OSTI ID:104429

Ader, C; Jendrzejczyk, J; Mangra, D

The Advanced Photon Source at Argonne National Laboratory is a facility signed to produce extremely brilliant x-rays for materials, chemistry, and medical research. In this facility, positrons are first produced and accelerated to energy levels of 7-GeV. The positrons are then injected into a 1104-meter circumference storage ring where they circulate, for periods up to 18 hours, and emit high-intensity x-rays as the circulating beam is oscillated by insertion devices. The beam is positioned and its size controlled by large electromagnets. The magnets are mounted on 200 individual girder assemblies, with each assembly having several magnets mounted on it. Of prime concern are the girder assemblies supporting the quadrupoles, or focusing, magnets. These magnets must satisfy very stringent vibration criteria, with motion restricted to less than a micron over a broad frequency range. Therefore, amplification at resonant frequencies of the girder assemblies must be minimized. To accomplish this, various viscoelastic damping materials and their placement in the system were evaluated. As a result of the study, dynamic magnification factors were reduced to a value of five with no detectable increase in static deflection. The damping materials and methods used to accomplish this in massive systems of 7,500 kg or greater, where the displacements are on the of 0.1 micron or less, will be useful for many less demanding situations.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 104429
• Report Number(s): ANL/ET/CP--85273; CONF-950740--84; ON: DE95014085
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
43 PARTICLE ACCELERATORS
ADVANCED PHOTON SOURCE
BEAM BENDING MAGNETS
DAMPING
DYNAMIC LOADS
MECHANICAL VIBRATIONS
SHOCK ABSORBERS
STORAGE RINGS
SUPPORTS